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LM4906 PDF预览

LM4906

更新时间： 2023-09-03 20:36:30
品牌 Logo 应用领域
德州仪器 - TI 放大器音频放大器
页数 文件大小 规格书
22页 1168K
描述
具有可选增益的 1W 单声道、模拟输入 AB 类音频放大器

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中文翻译

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LM4906 技术参数

是否Rohs认证： 符合生命周期：Obsolete
包装说明：TSSOP, TSSOP8,.19Reach Compliance Code：compliant
风险等级：5.84商用集成电路类型：AUDIO AMPLIFIER
JESD-30 代码：R-PDSO-G8JESD-609代码：e3
湿度敏感等级：1功能数量：1
端子数量：8最高工作温度：85 °C
最低工作温度：-40 °C封装主体材料：PLASTIC/EPOXY
封装代码：TSSOP封装等效代码：TSSOP8,.19
封装形状：RECTANGULAR封装形式：SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
电源：3/5 V认证状态：Not Qualified
子类别：Audio/Video Amplifiers最大压摆率：8 mA
表面贴装：YES温度等级：INDUSTRIAL
端子面层：Matte Tin (Sn)端子形式：GULL WING
端子节距：0.635 mm端子位置：DUAL
Base Number Matches：1

LM4906 数据手册

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LM4906, LM4906LDBD, LM4906MMBD  
www.ti.com  
SNAS191E –APRIL 2003–REVISED MAY 2013  
LM4906  
1W, Bypass-Capacitor-less Audio Amplifier with  
Internal Selectable Gain  
Check for Samples: LM4906, LM4906LDBD, LM4906MMBD  
1
FEATURES  
DESCRIPTION  
The LM4906 is an audio power amplifier primarily  
2
•
•
Selectable Gain of 6dB (2V/V) or 12dB (4V/V)  
designed for demanding applications in mobile  
phones and other portable communication device  
applications. It is capable of delivering 1W of  
continuous average power to an 8Ω BTL load with  
less than 1% distortion (THD+N) from a +5V power  
supply.  
No Output or PSRR Bypass Capacitors  
Required  
•
Improved “Click and Pop” Suppression  
Circuitry  
•
•
•
•
•
Very Fast Turn on Time: 5ms (Typ)  
Minimum External Components  
2.6 - 5.5V Operation  
The LM4906 is the first Texas Instruments Boomer  
Power Amplifier that does not require an external  
PSRR bypass capacitor. The LM4906 also has an  
internal selectable gain of either 6dB or 12dB. In  
addition, no output coupling capacitors or bootstrap  
capacitors are required which makes the LM4906  
ideally suited for cell phone and other low voltage  
portable applications.  
BTL Output Can Drive Capacitive Loads  
Ultra Low Current Shutdown Mode (SD Low)  
APPLICATIONS  
•
•
•
Portable Computers  
Desktop Computers  
Multimedia Monitors  
The LM4906 contains advanced pop and click  
circuitry that eliminates noise, which would otherwise  
occur during turn-on and turn-off transitions.  
Boomer audio power amplifiers were designed  
specifically to provide high quality output power with a  
minimal amount of external components. The  
KEY SPECIFICATIONS  
•
•
Improved PSRR at 217Hz for +3V: 71 dB  
LM4906 features  
a
low -power consumption  
Power Output at +5V, THD+N = 1%, 8Ω: 1.0 W  
shutdown mode (the part is enabled by pulling the SD  
pin high). Additionally, the LM4906 features an  
internal thermal shutdown protection mechanism.  
(Typ)  
•
•
Power Output at +3V, THD+N = 1%, 8Ω: 390  
mW (Typ)  
Total Shutdown Power Supply Current: 0.1µA  
(Typ)  
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of  
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
2
All trademarks are the property of their respective owners.  
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
Copyright © 2003–2013, Texas Instruments Incorporated  
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